<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
    </script>
</head>
<body>

<a href="" id ="test-jquery" >点我</a>

<script>

    //选择器就是css的选择器
    $('#test-jquery').click(functon(){
        alert('hello jquery');
    })


</script>
</body>
</html>